| Conţinutul numărului revistei |
| Articolul precedent |
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 SM ISO690:2012MIROVITSKII, Vadim. Space group and phonon symmetry of (RE1Ba2 Cu3 O7)m (RE2Ba2 Cu3 O7)n superlattices. In: Solid State Communications, 1992, vol. 83, pp. 931-935. ISSN 0038-1098. DOI: https://doi.org/10.1016/0038-1098(92)90914-U |
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  Solid State Communications |
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| Volumul 83 / 1992 / ISSN 0038-1098 /ISSNe 1879-2766 | ||||||
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| DOI:https://doi.org/10.1016/0038-1098(92)90914-U | ||||||
| Pag. 931-935 | ||||||
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It is shown by group theory methods that the symmetry of (RE1Ba2 Cu3 O7)m (RE2Ba2 Cu3 O7)n superlattices grown along [1 0 0], [0 1 0] and [0 0 1] crystallographic directions is described by the same space group Pmmm (D2h1) as that of the initial bulk crystalline structure. The arrangement of atoms over Wyckoff positions in multiplied primitive cells of the superlattices is obtained for each of growth directions and all (m, n) combinations. Symmetry classification of phonons at k = 0 is also carried out. Some features of phonon spectra of ultrathin superlattices are briefly discussed. |
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| Cuvinte-cheie Crystal atomic structure, Crystal symmetry, crystallography, High temperature superconductors, Lattice vibrations, mathematical models, phonons, thin films |
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